EP0603895A1 - Isolationssystem - Google Patents

Isolationssystem Download PDF

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Publication number
EP0603895A1
EP0603895A1 EP93120819A EP93120819A EP0603895A1 EP 0603895 A1 EP0603895 A1 EP 0603895A1 EP 93120819 A EP93120819 A EP 93120819A EP 93120819 A EP93120819 A EP 93120819A EP 0603895 A1 EP0603895 A1 EP 0603895A1
Authority
EP
European Patent Office
Prior art keywords
sheet
panels
fitted
peripheral wall
edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93120819A
Other languages
English (en)
French (fr)
Inventor
Luca Bulgari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CIB Srl
Original Assignee
CIB Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CIB Srl filed Critical CIB Srl
Publication of EP0603895A1 publication Critical patent/EP0603895A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/02—Casings; Cover lids; Ornamental panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/181—Construction of the tank
    • F24H1/182—Insulation

Definitions

  • the present invention relates to an insulating system, particularly for building structures and for heating devices such as boilers.
  • Boilers are of cylindrical shape and insulating systems for them consist of insulating structures which cover the boiler in close contact therewith and are also of cylindrical shape.
  • the insulating structure is of modular type and includes a plurality of aluminium sheets which are of circular arcuate shape in section. Polyurethane is hot-injected onto the inner face of each sheet which faces the boiler so as to form a panel comprising an aluminium layer and a polyurethane layer.
  • the structure finally includes articulated joints along the vertical, side edges of the panels so as to give the insulating structure a cylindrical shape. More particularly, these joints are formed by bending of the vertical side edges of the aluminium sheets.
  • the insulating structure cannot easily be recycled if it must be replaced, for example, due to breakdown since it is not in fact easy to separate the aluminium sheet from the polyurethane layer, with all the disadvantages this has with regard both to the cost of recycling the materials and the possibilities of environmental pollution should the separation not be effected properly.
  • the aluminium sheet and the polyurethane layer may be considered as a unitary piece whereby any damage to one of the two elements making up the panel requires the replacement of the entire panel, it not being possible, for the considerations mentioned above, to change only one of the two elements.
  • the aluminium sheet is subject to thermal expansion; which expansion has a harmful effect on the couplings (joints) between the panels.
  • thermal expansion gives rise to mechanical stresses between adjacent panels; which stresses may cause the side edges of the sheets to crack and the panels themselves to become disconnected.
  • further mechanical stresses are set up at the contact surfaces between the various layers of material of the panels. In effect, the thermal expansions and consequent mechanical stresses tend to vary the geometry of the couplings between the adjacent panels and hence cause slits to form which cannot do other than reduce the insulating capacity of the structure as a whole.
  • the insulating structure described above does not ensure perfect contact between its inner surface and the outer surface of the boiler whereby channelling can occur which causes a stack, or chimney, effect that is, an upward flow of heat towards the cover plate of the structure.
  • the result of this stack effect is a considerable thermal stress which affects the cover plate almost exclusively and an increase in the heat dispersal.
  • the object of the present invention is to provide an insulating system which does not have the disadvantages mentioned above.
  • the basis of the present invention is an insulating system for a defined space comprising a modular insulating structure, characterised in that the structure comprises a plurality of panels each including a respective sheet of rigid plastics material and a respective metal sheet fitted to the outer surface of the plastics sheet after its manufacture.
  • FIG. 1 illustrates an insulating system which, in this embodiment, is fitted to a hot water tank 1 commonly called a boiler.
  • the insulating system comprises an insulating structure 2 which covers the tank 1 and, for this purpose, has a shape which is adapted to the shape of the tank 1. Since, in this embodiment, the tank 1 is cylindrical with its longitudinal axis A vertical, the structure 2 also has a cylindrical shape with axis A and, in particular, is defined by a cylindrical peripheral wall with axis A and a circular upper wall lying in a horizontal plane and providing a sealed closure for the structure 2.
  • the structure 2 is of modular type in that its peripheral wall is defined by a plurality of part-cylindrical panels 3 connected together and its upper wall is defined by a cover plate 4 formed in two coplanar parts 4a and 4b.
  • each panel 3 comprises a sheet 5 of rigid plastics material and a metal sheet 6 fitted, after the construction of the sheet 5, to the outer surface of the latter.
  • the sheet 5 may be produced by moulding, extrusion or formed in a block and may be made of polyurethane, expanded polystyrene, polystyrene, phenolic resins or ureic resins.
  • the sheet 5 is rectangular in outline and hence has four edges, two horizontal and two vertical.
  • the lower horizontal edge of the sheet 5, in this embodiment ( Figure 1) has a flat surface which bears on the floor.
  • the upper horizontal edge of the sheet 5 has a semi-annular projection 7 on its outermost ring which extends upwardly, coaxially with the structure 2.
  • the formation of the projection 7 defines four part-annular flat surfaces which, in succession, comprise a horizontal surface 8 which constitutes the upper face of the projection 7, a vertical surface 11 which constitutes the inner face of the projection 7, a horizontal surface 12 which constitutes the upper face of the sheet 5 alongside the projection 7, and a vertical surface 13 which constitutes the upper part of the inner face of the sheet 5.
  • the sheet 5 has a first vertical edge surface along the entirety of the longitudinal central zone whereof there is a projection 14 which extends in a vertical plane B and has a tapered thickness.
  • the projection 14 is defined by two lateral faces 15, which converge from opposite sides towards a vertical straight line in the plane B, and an end face 16 lying in a vertical plane perpendicular to the plane B.
  • a recess 17 is formed along the entire longitudinal extent of the central part the end face 16.
  • the sheet 5 has a second vertical edge surface formed along the entire longitudinal extent of its central region with a channel 18 in the vertical plane B having a tapered width. More particularly, the depth and width of the channel 18 are substantially equal to the height and thickness respectively of the projection 14.
  • the channel 18 is defined by two lateral faces 21 which converge on opposite sides towards a vertical straight line in the plane B and a bottom face 22 lying in a vertical plane perpendicular to the plane B.
  • a recess 23 is formed along the entire longitudinal extent of the central part of the bottom face 22.
  • the sheet 6 has two vertical edge portions 24 which are bent and which, when the sheet 6 is fitted on to the sheet 5, cooperate with the outermost parts of the vertical edge surfaces of the sheet 5.
  • the sheet 6 wraps around the outside of the sheet 5 and, the sheet 6 being formed with a predetermined geometry, close contact is formed between the inner surface of the sheet 6 and the outer surface of the sheet 5 and between the inner surfaces of the edge portions 24 of the sheet 6 and the outermost parts of the vertical edge surfaces of the sheet 5.
  • This mode of assembly also effectively anchors the sheets 5 and 6 of each panel 3 together.
  • each projection 14 of one panel 3 is engaged in the channel 18 in the adjacent panel 3.
  • the recesses surfaces 17 and 23 have the same geometry, the same dimensions and face each other to define a seat for a thermal seal 25.
  • the seal 25 has a smaller width than the width of the recesses 17 and 23 and a greater thickness than the sum of the depths of the recesses 17 and 23. Since the washer 25 is made of elastically deformable material, during the introduction of the projection 14 of one panel 3 into the channel 18 in the adjacent panel 3, the washer 24 deforms so as to occupy the entire seat defined by the recesses 17 and 23. The washer 25 thus avoids the formation of "heat bridges" along the vertical joints between the panels 3.
  • the parts 4a and 4b of the cover plate 4 are formed of substantially like the panels 3 in terms of materials.
  • the parts 4a and 4b each include a respective sheet 31 of rigid plastics material and a respective metal sheet 32 covering the corresponding sheet 31.
  • the parts 4a and 4b each have a respective straight edge and a respective semi-circular edge; the straight edges lying along the diameter of the plate 4 and the semi-circular edges together defining the periphery of the plate 4.
  • the straight edge surface of the sheet 31 of the part 4a is formed like the said second vertical edge surface of the plate 5 while the straight edge of the sheet 31 of the piece 4b is shaped like the said first vertical edge surface of the sheet 5.
  • Figure 7 may also show the straight edge surfaces of the parts 4a and 4b.
  • the straight edge surface of the sheet 31 of the part 4a has a channel 33 like the channel 18 along the entirety of its central region.
  • the channel 33 is defined by two side faces 34 and a bottom face 35.
  • a recess 36 is formed along the entirety of the central part of the bottom face 35.
  • a thermal seal 37 is fitted into the recess 36.
  • a re-entrant portion 38 of smaller depth is formed around the lower part of the semi-circular edge portion of the sheet 31 of the part 4a and houses a thermal seal 41 while the upper part is formed with a projection 42 which extends in a horizontal plane around the entirety of the semi-circular edge.
  • the projection 42 also has a shallow recess 43 which houses a thermal seal 44.
  • the sheet 32 has a peripheral shape substantially the same as that of the sheet 31.
  • the sheet 32 has a straight edge portion which is bent so as to define a flange 45 for contact with the upper region of the straight edge surface of the sheet 32 including the projection 42 and a semi-circular edge of larger diameter than that of the projection 42.
  • the sheet 31 of the part 4b has a straight edge like the said first vertical edge of the sheet 5 as already indicated above and a semi-circular edge exactly like the semi-circular edge of the sheet 31 of the part 4a.
  • the sheet 32 of the part 4b is shaped and fitted to the corresponding sheet 31 in the same way as the sheet 32 of the part 4a.
  • the components of the part 4b are indicated by the same references as the corresponding components of the part 4a starting from the straight edge of the sheet 31.
  • the straight edge of the sheet 31 of the part 4b has a projection (not illustrated) of tapered thickness defined by two side faces which converge on opposite sides towards a horizontal straight line and an end face formed centrally with a recess which, together with the recess 36, constitutes the seat for the seal 37.
  • the parts 4a and 4b are located adjacent each other so as to form the plate 4. More particularly, the channel 33 in the part 4a is engaged by the corresponding projection on the straight edge surface of the part 4b.
  • the recesses which constitute the seat for housing the seal 37 have the same geometry, the same dimensions and obviously face each other.
  • the seal 37 behaves like the seal 25 and, in particular, the seal 37 has a width which is less than the width of the said seat and a thickness which is greater than the sum of the depths of the recesses which constitute this seat. Since the seal 37 is made from an elastically deformable material, it deforms so as to occupy the whole of its seat during the assembly of the plate 4.
  • the plate 4 is fitted into the upper zone defined by the peripheral wall of the structure 2 where it fits tightly. More particularly, the part of the circular edge of the plate 4 provided with the seal 41 will be in tight contact with the surfaces 13, the lower surfaces of the projections 42 will be in tight contact with the surfaces 12, the edge surfaces of the projections 42 will be in tight contact with the surfaces 11 and the parts of the sheets 32 which project from the sheets 31 will be in tight contact with the surfaces 8.
  • the plate 4 being suitably dimensioned, correct and effective fitting of this into the upper zone defined by the peripheral wall of the structure 2 will be achieved.
  • the seals 41 and 44 will be pressed thereby against the surfaces 13 and the surfaces 11 respectively.
  • the seals 37, 41 and 44 prevent the formation of "heat bridges" along the joints between the parts 4a and 4b and the joints between the plate 4 and the peripheral wall of the structure 2.
  • a through-hole 51 is provided in the centre of the plate 4 and is defined by a recess formed in the part 4a and a recess formed in the part 4b; the hole 51 is engaged by a pin 52 which projects from the tank 1 along the axis A so as to centre the tank and the structure 2 relative to each other.
  • Further annular thermal seals 53 are fitted between the inner face of the peripheral wall of the structure 2 and the peripheral wall of the tank 1 in tight contact with these walls; the seals 53 prevent upward channelling of the heat, that is the chimney effect.
  • the structure 2 includes an annular profiled section 54 of inverted-L shape which anchors the plate 4 to the panels 3.
  • an insulating system is formed in which the insulating structure allows the metal components and the plastics ones to be assembled and separated in a simple manner.
  • This indubitably simplifies, and among other things lowers the cost of, the production of the various panels and parts of the structure since no hot injection of plastics material onto metal is required which is known to be difficult to carry out and relatively expensive.
  • the metal is not subjected to thermal expansion which, as noted previously, is a source of mechanical stress, cracking and fissuring.
  • the tight joints between the various components of the structure and the use of seals along the joints avoids the creation of heat bridges.
  • the peripheral wall of the structure is perfectly cylindrical whereby, with the aid of the seals 53, the chimney effect is avoided and hence the cover plate is not subjected to high thermal stress.
  • the insulating system described above may be used for insulating a defined space or apparatus of any dimensions and shape by suitable variation of the dimensions and geometry of the components of the structure.
  • the number of components may differ from that illustrated and, in particular, there may be more or fewer than the four units illustrated and the same may be said for the components of the cover plate.
  • the components of the cover plate also to be formed integrally with the panels 3, naturally the plastics material with the plastics material and the metal with metal.
  • the insulating structure may rest on the floor as illustrated or on feet or support brackets with which the tank 1 is provided.
  • fixing means may be provided for fixing together the metal sheets and the corresponding plastics sheets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Building Environments (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP93120819A 1992-12-23 1993-12-23 Isolationssystem Withdrawn EP0603895A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO920453 1992-12-23
ITBO920453A IT1260240B (it) 1992-12-23 1992-12-23 Sistema di coibentazione.

Publications (1)

Publication Number Publication Date
EP0603895A1 true EP0603895A1 (de) 1994-06-29

Family

ID=11338595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93120819A Withdrawn EP0603895A1 (de) 1992-12-23 1993-12-23 Isolationssystem

Country Status (2)

Country Link
EP (1) EP0603895A1 (de)
IT (1) IT1260240B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402U1 (de) * 1994-12-14 1995-09-25 Austria Email Waermetech Gmbh Isolierter behaelter, insbesondere warmwasserspeicher
WO2010096667A2 (en) 2009-02-20 2010-08-26 Power Panel, Inc. Insulated storage tank
JP2015102286A (ja) * 2013-11-26 2015-06-04 株式会社ノーリツ 貯湯給湯装置
JP2016142479A (ja) * 2015-02-03 2016-08-08 株式会社コロナ 貯湯式給湯機
JP7415968B2 (ja) 2021-01-28 2024-01-17 三菱電機株式会社 貯湯式給湯機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH522183A (fr) * 1971-02-03 1972-04-30 Ortlieb Jean Chauffe-eau démontable
FR2125677A5 (de) * 1971-02-16 1972-09-29 Ideal Standard
DE2611115A1 (de) * 1976-03-17 1977-09-29 Hans Viessmann Isoliermantel insbesondere fuer heizkessel
FR2548338A1 (fr) * 1983-07-01 1985-01-04 Gianola Productions Chauffe-eau a accumulation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH522183A (fr) * 1971-02-03 1972-04-30 Ortlieb Jean Chauffe-eau démontable
FR2125677A5 (de) * 1971-02-16 1972-09-29 Ideal Standard
DE2611115A1 (de) * 1976-03-17 1977-09-29 Hans Viessmann Isoliermantel insbesondere fuer heizkessel
FR2548338A1 (fr) * 1983-07-01 1985-01-04 Gianola Productions Chauffe-eau a accumulation

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402U1 (de) * 1994-12-14 1995-09-25 Austria Email Waermetech Gmbh Isolierter behaelter, insbesondere warmwasserspeicher
WO2010096667A2 (en) 2009-02-20 2010-08-26 Power Panel, Inc. Insulated storage tank
EP2398719A2 (de) * 2009-02-20 2011-12-28 Power Panel, Inc. Isolierter speichertank
EP2398719A4 (de) * 2009-02-20 2015-02-18 Power Panel Inc Isolierter speichertank
JP2015102286A (ja) * 2013-11-26 2015-06-04 株式会社ノーリツ 貯湯給湯装置
JP2016142479A (ja) * 2015-02-03 2016-08-08 株式会社コロナ 貯湯式給湯機
JP7415968B2 (ja) 2021-01-28 2024-01-17 三菱電機株式会社 貯湯式給湯機

Also Published As

Publication number Publication date
ITBO920453A0 (it) 1992-12-23
IT1260240B (it) 1996-04-02
ITBO920453A1 (it) 1994-06-23

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